Development and application of LSP micro shock driver

当我们用激光照射固体表面(金属表面)时，激光的光能激发固体，在固体表面产生等离子体，从而在环境气体中产生等离子体冲击波。本研究进行了一项有效利用这种冲击波的研究。我们对激光集光产生的冲击波进行了实验测量。冲击波通过将激光照射到各种金属板上而产生。我用铝、不锈钢、黄铜、钛做金属板。我们进行了一次实验，确定了激波爆发的极限为2006年，增强了2007年激光能量强度较大的辐照强度。利用这种强度，我用阴影图形学和BOS方法在*1 mm附近1 mm的观察域内光学地观察到了激波或激波的状态，并要求激波的马赫数随时间变化。冲击波的测量要求每隔20 ns确定一次冲击波的位置。这种情况下的几种测量范围都是以十μm为单位的测量，难度很大，但通过许多实验成果获得了可靠的数据。我位于球面波和平面波的传播特性之间，当它通过提供的冲击波的位置数据来追求时间的函数的程度时，我变得明显地在球面波的传播特性中相当接近。激波爆发后不久的马赫数是相当高的速度，结果表明，马赫数提供了大约15的东西。冲击波的马赫数与物质的金属性质无关，并给出了与原始预测相反的结果。

When we irradiated a laser on the solid surface (a surface of metal), a solid is excited by light energy of a laser and plasma will be induced at the surface, so as a result, a shock wave is formed in an ambient gas by plasma. The present study performed a study to utilize this shock wave effectively. We performed an experiment measurement of a shock wave to occur by collection of light of a laser. The shock wave generated it by irradiating a laser to various kinds of metal plates. I used aluminum, stainless steel, brass, titanium for a metal plate. We performed an experiment the limit around that shock wave outbreak was confirmed for 2006 having enforced the irradiation strength with comparatively big energy strength in 2007 laser. With this strength, I observed a shock wave or a state to occur by shadow graphology and BOS method optically in an observation domain of 1mm around * 1mm and demanded a time change of a Mach number of a shock wave. The measurement of a shock wave demanded a position of a shock wave every 20 ns. Measurement range several of this case were full of the measurement neighbor by a unit of ten μm, difficulty, but reliable data were acquired by many experiment accomplishment. I was located between spread characteristics of a spherical surface wave and plane wave when it pursued the degree for a function of time by position data of a provided shock wave, and it became clear to be considerably near in a spread characteristic of a spherical surface wave. A Mach number just after shock wave outbreak was considerable high speed, and it was shown that a thing of around 15 was provided in a Mach number. A Mach number of a shock wave did not show dependence for metal properties of matter, and the result that was against an original prediction was provided.